Psychology 1000 Chapter Notes - Chapter 12: Fetal Alcohol Spectrum Disorder, Umbilical Cord, Testis Determining Factor

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Laura Fazakas- De Hoog

Document Summary

Cross-sectional design: compare people of different ages at the same point in time. Longitudinal design: same people studied over a period of time. Sequential design: repeatedly test several age groups as they grow older. Placenta: allow nutrients to pass from mother"s blood to umbilical cord. Umbilical cord: blood vessels that carry nutrients and oxygen to embryo: fetal stage: ninth week until birth, embryo is called a fetus. The egg divides in two, if it separates identical twins, if both halves fertilized fraternal twins. End of first trimester (3 months): external body parts and internal organs have formed. Male"s 23rd pair contains x and y (so male determines the sex) Y contains tdf (testis determining factor) gene, triggers male sexual development. Sexually transmitted diseases can pass from mother to fetus. Regular drinking (1-2): impaired motor skills, slower information processing. Irregular binge drinking (5 or more): lower intelligence, academic and behavior problem.